import java.util.Scanner;
public class rr{
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入天气降温:");
        double temperature =scanner.nextDouble();

        if (temperature >40){
            System.out.println("大家都熟了");
        } else if (temperature >=30){
            System.out.println("我们只要空调、西瓜和WIFI");
        } else if (temperature >=20){
            System.out.println("天气凉，可以浪");
        } else{
            System.out.println("多穿衣服，免得感冒");
        }
    }
}